27% of top 300 Xbox games are back-compatible

Cheap Ass Gamer (and Joystiq's good buddy) CheapyD put on his thinking cap to figure out just what percentage of the top-rated Xbox games work on the 360. With notable classics like Psychonauts still unplayable (did you send out your e-mail?), how far along is the MS team in their ongoing struggle to getting "darn close to that stated goal of every title" backwards compatible?

CheapyD culled the titles from aggregate review-site Metacritic, cross-checked them against Microsoft's list, then threw it all into a chart for those of us who can't read are visual learners. The key points:

• 80% of the top-10 reviewed titles are backwards compatible. The two missing all-stars: Tony Hawk's Pro Skater 3 and Burnout 3.
  
• Only 27% of the top-300 reviewed titles are backward compatible. 

Even 300 titles is a far cry from the 800 or so titles currently available for the original Xbox. Wait, Far Cry? Nope, not available.